Fire-alarm.



J. TFBLAND.

FIRE ALARM.

APPLICATION FILED my 10, 1911.

Patented Nov. '21, 1911.

' UNITED STATES PATENT OFFICE.

JOSEPH T. BLAND, OF PITTSBORO, NORTH CAROLINA.

FIRE-ALARM.

rooaess.

To all whom it may concern Be it known that I, JosEPi-i T. BLAND, a citizen of the United States, residing at Pittsboro, in the county of Chatham and State of North Carolina, have invented new and useful Improvements in Fire-Alarms, of which the following is a specification.

This invention relates to fire alarms, and has, for an object to provide one or a series of explosives and a fuse leading thereto and adapted to be extended through any portion of the building so that at the time of fire the fuse will be ignited.

Another object of the invention is to provide fusible tubes or casings for the fuses so as to prevent the fuses from being mutilated by rats or the like.

In the drawing, forming a portion of this specification and in which like numerals of reference indicate similar parts in the several views :F igure 1 is a side View of the alarm. Fig. 2 is a longitudinal section therethrough.

The alarm preferably comprises a series of metallic casings 1, 2 and 3, the casings 1 and 3 respectively each being provided at its outer end with a closed head 4. At the inner end, the casings 1 and 3 respectively are closed by removable heads 5, each having a branch tubular portion 6 and an integral head 7. The heads 7 are threaded to the intermediate casing 2, as shown. Each casing has removably mounted therein an explosive 8 in form of a firecracker, the explosives being arranged in series and connected with each other by the fuses 9, portions of which being extended through the tubular branch portions 6 hereinbefore described.

Specification of Letters Patent.

Application filed May 10, 1911.

Patented Nov. 21, 1911.

Serial No. 626,165.

Each of the casings 1, 2 and 3 is provided with one or a plurality of nipples 10 to which are connected fusible tubes 11 which are adapted to be extended through the walls of a building or other structure and arranged for exposure at the time of fire. These tubes may be of any suitable material but are preferably formed of lead so that they will quickly melt when exposed to the fire. A branch fuse 12 is arranged in each of the casings hereinbefore described and connected, at 13, with the fuses 9. These branch fuses are connected with similar fuses 14; which extend through the fusible tubes 11.

The casing 2 carries a bracket 15 by means of which the device can be arranged exteriorly of a building. At the time of fire one or more of the tubes 11 will be melted and the fuses therewithin will be exposed to the fire so as to ignite the fuses 9 and 12 respectively to set off the explosives. The casings 1, 2 and 3 respectively of the device are provided with perforated portions 16 so as to prevent destruction of the casings when the explosives are set 01f.

I claim:

An audible alarm comprising a perforated casing, an explosive therein, a fuse for the explosive, and a fusible tube protecting the fuse.

In testimony whereof I my signature in presence of two witnesses.

JOSEPH T. BLAND.

Witnesses:

AUBURN W. BLAND, FLETCHER C. MANN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of. Patents. Washington, D. G. 

